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Synthesizing higher-capacity hard-carbons from cellulose for Na- and K-ion batteries

Abstract

Non-graphitizable hard carbons are synthesized through carbonization of glucose, sucrose, maltose, cellulose, glycogen and amylopectin. Cellulose-derived carbon delivers superior reversible sodiation capacity, and optimal carbonization for higher capacity Na-ion battery is found to be two-step heating of cellulose at 275 ⁰C and 1300–1500 ⁰C in air and argon, respectively. The hard carbon delivers the highest reversible capacity of 353 mAh g-1 in Na cell. The 275 ⁰C heating is important to regulate dehydration and cross-linkage degrees of cellulose, which affect nano-scale structure of hard carbons. The cellulose-derived carbons deliver 523 and 290 mAh g-1 in Li and K cells, respectively.

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Publication details

The article was received on 02 Jun 2018, accepted on 31 Jul 2018 and first published on 04 Aug 2018


Article type: Communication
DOI: 10.1039/C8TA05203D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Synthesizing higher-capacity hard-carbons from cellulose for Na- and K-ion batteries

    H. Yamamoto, S. Muratsubaki, K. Kubota, M. Fukunishi, H. Watanabe, J. Kim and S. Komaba, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05203D

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